Open source
users can modify and distribute the software
can be installed on any number of computers
support provided by the community
users have access to the source code
may not be fully tested
Open source advantages
software is free
wide community modification
gets software out into wider community for creator
Open source disadvantages
can be poorly supported
some features may not be well tested
little to no financial gain for creators
Closed source
usually paid for and licensed per user or per computer
supported by developers who do not release source code
tested by developer prior to release although it may not run beta programs
Closed source advantages
well supported tested and professional built product
creators receive an income for their product
Closed source disadvantages
costs or ongoing subscription fee
constant demand from community for more features and improvements
privacy issues